If you want entry level control, but you need a power sub panel on the pool pad - E-Command 4 is for you. It offers the same level of automation as OnCommand but with a built in sub panel. The E-Command 4 is the easy and cost-effective way to automate essential pool and spa functions. Control filter pump, heater, lighting and more. Automate schedules to turn lights on at night or to manage energy-saving two- or variable-speed pumps for better efficiency. Functions can be set to run automatically or can be controlled from an optional wireless spa-side, floating remote. The base system supports 4 high voltage relays, 3 valves, 1 heater and solar. Whatever the function, pool owners can maintain basic control of their pool and spa with E-Command 4.Applications: Entry-level automation with an electrical sub panelIncluded: (1) ECOMMAND 4 Electronics Unit (3) Temperature sensors with 15 ft. (5m) cable, hose clampWhats NOT Included: Some of the additional items that you may need to complete an installation include: Circuit breakers: None are included with control Wire: 4-conductor cable (electronics unit to external chlorination) Wire/conduit for 100A service from main panel to ECOMMAND 4 Wire/conduit for filter pump and other high voltage loads Wire for bonding Mounting hardware (screws, etc.) for mounting ECOMMAND 4 Valves (use standard Hayward, Pentair/Compool, or Jandy valves) Additional valve actuators